In the pic, Carpenter and Marquardt, who met at the Playboy Mansion and have been dating since 2008, are holding hands, showing off an extremely unique engagement ring -- a diamond encrusted spider.
A sign that reads "Till Death Do Us Part" is pictured in the background.
This whole dating thing feels new again and she says it's just like being back in high school.
Chatter about Nick and Bridget actually started back in September, but they have been successful at keeping it on the down low. According to her old beau, it's all good and he says the couple can come and hang out at the mansion anytime.
Though it hasn't been confirmed whether the jewelry is her actual engagement ring, it wouldn't be that surprising, seeing how Halloween-obsessed Marquardt is in real life.
Marquardt frequently posts about her favorite holiday on her social media accounts.
is an American television personality, model, and actress, known for her role on the reality television series The Girls Next Door, which depicted her life as one of Playboy magazine publisher Hugh Hefner's girlfriends.
Although not a Playboy Playmate, she has appeared in nude pictorials with her Girls Next Door co-stars and fellow Hefner girlfriends Holly Madison and Kendra Wilkinson.
Bridget Marquardt, born Bridget Christina Sandmeier, was born in Tillamook, Oregon.
Shortly after her birth, Marquardt's mother moved the family back to California, where Marquardt was raised.
In 2001, Marquardt moved to Los Angeles, California and did local modeling jobs and small acting roles.